"Phone fraud" can refer to a variety of fraudulent practices involving telephones, whether it be a land-line phone, cell-phone, or related device. Two of the most common forms of phone fraud include:
Cramming fraud - unauthorized, misleading, or deceptive charges on your telephone bill
"Cramming" is the practice of placing misleading or unauthorized charges on a customer’s telephone bill. Authorized charges may also constitute cramming if the telecommunications company misled the consumer about the cost of the service in their marketing campaign.
Slamming fraud - your authorized telephone company is switched without your permission
"Slamming" is the illegal practice of switching a customer’s local or long distance telephone service without their authorization. Telecommunication carriers engage in slamming by using fraudulent practices to obtain a consumer’s authorization through telemarketing, telephone surveys, or sweepstake forms.
Other forms of phone fraud may include issues relating to false advertising, misrepresentation, or other unfair activities.